Government ministers, party leaders, MSPs, celebrity chefs Jamie Oliver and Nick Nairn, and John Prescott all weighed in behind Martha Payne.
Her blog on the meals served up at Lochgilphead Primary School, had won a global audience in the last six weeks with more than two million views.
But it was the news that the council had banned her from taking photographs of the food to use on her blog, that sent matters into overdrive yesterday with 160 views a minute.
The council's ban followed a newspaper article published this week featuring a photograph of Martha alongside Nick Nairn under the headline "Time to fire the dinner ladies".
The council issued a statement saying it "wholly refutes the unwarranted attacks on its schools catering service which culminated in national press headlines which have led catering staff to fear for their jobs".
The authority said it hadn't criticised Martha's blog "despite a strongly held view that the information presented in it misrepresented the options and choices available to pupils, however, this escalation means we had to act to protect staff from the distress and harm it was causing".
But by lunchtime the public outcry over the ban (including a 1000-signature online petition) was such that Argyll and Bute's new SNP leader Roddy McCuish issued his own statement: "There is no place for censorship in this council. I have advised senior officers that this administration intends to clarify the council's policy position in regard to taking photos in schools.
"I have therefore requested senior officials to consider immediately withdrawing the ban on pictures from the school dining hall until a report can be considered by elected members."
He said this would allow the continuation of Martha's NeverSeconds blog. He described Martha as an enterprising and imaginative pupil. He said: "But we all must also accept that there is absolutely no place for the type of inaccurate and abusive attack on our catering and dining hall staff, such as we saw in one newspaper yesterday."
Martha is blogging to raise money for Mary's Meals, an international movement that sets up school feeding projects in poor communities. She started yesterday with £2000, but by last night she had more than £44,000.
The charity said: "Martha has now raised enough money to build a kitchen in Malawi ... and has broken the record for hitting a Sponsor A School online fundraising target in the quickest amount of time."
The wave of support was in response to her blog of Thursday night: "This morning in maths I got taken out of class by my headteacher. I was told that I could not take any more photos of my school dinners because of a headline in a newspaper today.
"I only write my blog, not newspapers, and I am sad I am no longer allowed to take photos. I don't think I will be able to finish raising enough money for a kitchen for Mary's Meals either."
Jamie Oliver tweeted: "Stay strong Martha", while Education Secretary and local SNP MSP Mike Russell tweeted: "The decision is daft and I will be asking the council chief executive to reverse it."
News of the council's U-turn was widely welcomed. Harry MacMillan, chief executive of MEND (Mind, Exercise, Nutrition...Do it!) which supports families to eat more healthily, said: "Martha's innovative blog is an excellent platform for her and others across the globe to share their opinions on school meals and is an inspirational and necessary example to many other children in Scotland and beyond."
LibDem leader Willie Rennie said: "I'm pleased they've had a blogosphere conversion and decided to revoke the ban. "